Ahoy, there are two things that keep me going, even when I feel like I'm done. One is my kids. Two is the thought that even though I don't understand it, in all likelihood my H didn't just up and walk away, he was unhappy for a long time. Maybe he didn't deal with that unhappiness in a productive way, but it was there. If that's true, then how is it I'm ready to walk away so soon. That keeps me standing for now.
And boy do I know about teen and tween girls. I'm blessed with one of each at home at the moment.